Ag Nanoparticles on Boron Doped Multi-walled Carbon Nanotubes as a Synergistic Catalysts for Oxygen Reduction Reaction in Alkaline Media. (20th August 2015)

• Record Type: Journal Article
• Authors: Cheng, Yuanhang; Tian, Yayuan; Tsang, Sai-Wing; Yan, Chuanwei
• Is Part Of: Electrochimica acta. Volume 174(2015)
• Page Start: 919
• Page End: 924
• Publication Date: 2015-08-20
• Subjects: Ag nanoparticles -- boron doped multi-walled carbon nanotubes -- electrocatalyst -- oxygen reduction reaction; Electrochemistry -- Periodicals; Electrochemistry, Industrial -- Periodicals; 541.37
• DOI: 10.1016/j.electacta.2015.05.183
• Languages: English
• ISSNs: 0013-4686

Abstract

Highlights: The mass activity of Ag/B-MWCNTs reduces with increasing of Ag loading. The B-MWCNTs can be a promising supporting material for low-cost ORR catalyst. This work the role of supporting materials in reducing the loading of metal catalyst. Abstract: Here we report the oxygen reduction reaction (ORR) activity of Ag nanoparticles supported on boron doped multi-walled carbon nanotubes (Ag/B-MWCNTs) with different Ag loadings synthesized by a facile chemical method. Transmission electron microscopy (TEM) and X-ray diffraction patterns (XRD) measurements were employed to investigate the morphology and crystal structure of the as-prepared catalysts. The electrochemical results demonstrated that all the Ag/B-MWCNTs samples catalyzed the ORR in alkaline media by an efficient four-electron pathway. Furthermore, Ag/B-MWCNTs with lowest Ag loading (20%) performed the highest mass activity towards ORR mainly due to the synergistic effect of Ag nanoparticles and B-MWCNTs. This work brings insight into the role of supporting materials in reducing the loading of metal catalyst towards low-cost ORR in alkaline media.